package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.utils.HttpClientUtil;
import org.apache.http.impl.client.HttpClients;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements com.sky.service.UserService {
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    //微信服务登录地址
    public static final String WX_LOGIN ="https://api.weixin.qq.com/sns/jscode2session";
    @Override
    public User login(UserLoginDTO userLoginDTO) {
        /**
         * 调取当前服务获取openid
         */
        String json = getString(userLoginDTO);
        //判断openid是否为空，空的话就抛出业务异常
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        if(openid == null) {
            throw new RuntimeException("登录失败");
        }
        //判断当前用户是否为新用户
        User user = userMapper.selectByOpenid(openid);


        //如果是新用户，自动完成注册
        if(user == null) {
             user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);

        }

        //返回用户对象
        return user;

    }
    /**
     * 调取当前服务获取openid
     */
    private String getString(UserLoginDTO userLoginDTO) {
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        return json;
    }
}
